CN112762607B - Water storage type water heater and equivalent hot water amount measurement and control method and measurement and control device thereof - Google Patents
Water storage type water heater and equivalent hot water amount measurement and control method and measurement and control device thereof Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
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- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
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- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2014—Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
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Abstract
The application discloses equivalent hot water amount measuring and controlling method for a water storage type water heater, which comprises the following steps: obtaining equivalent hot water quantity according to the hot water quantity in the water storage type water heater, the hot water temperature in the water storage type water heater, the cold water temperature of a water supply system and the equivalent hot water temperature; displaying the equivalent hot water quantity and the equivalent hot water temperature; setting an equivalent hot water quantity control target; and controlling the water storage type water heater according to the difference value between the equivalent hot water amount and the equivalent hot water amount control target, so that the equivalent hot water amount approaches to the set equivalent hot water amount control target. The application also discloses an equivalent hot water quantity measuring and controlling device of the water storage type water heater and the water storage type water heater. Compared with the temperature, the equivalent hot water quantity and the equivalent hot water available time are closer to the real experience of using hot water, so that a user can visually know the working state of the water storage type water heater, the user is helped to easily set a control target, meanwhile, the method can be used for direct summation calculation, and the data calculation and processing of a water heater system are facilitated.
Description
Technical Field
The application relates to the technical field of water heaters, in particular to a method for measuring and controlling equivalent hot water quantity of a water storage type water heater, a measuring and controlling device and the water storage type water heater.
Background
The technical development direction of the water storage type water heater is to provide better hot water using experience for users and continuously improve the energy-saving effect. The measurement and control technology of the existing water storage type water heater is around the concept of temperature: and measuring the water temperature, and controlling the heating device according to the difference value between the measured water temperature and the temperature control target so as to keep the temperature of the hot water in the water storage type water heater close to the temperature control target. However, the prior art has encountered problems in further developments.
First, the user experience is poor. In life, the typical way of using hot water is to mix the hot water output with the cold water of the water supply system to a "comfortable temperature" for use. The temperature of the output hot water does not represent the actual available amount of hot water. For example, hot water, also heated to 65 ℃, can give significantly less "comfort temperature" hot water in winter than in summer; the temperature indication of 65 ℃ brings confusion to users; to obtain an equivalent "comfort temperature" hot water volume, the temperature control setting should be somewhat higher in winter than in summer, but it should be somewhat higher at all times, and unknown to the user.
Secondly, the energy saving effect is not good. The 'just-in-time' state can avoid the storage water heater from keeping too high temperature and increasing heat loss. Because the intuitive relation between the temperature control target of the water heater and the hot water quantity cannot be established, a user is difficult to grasp what the hot water target temperature corresponding to the 'sufficient to be' state is, only tends to buy a large-capacity water heater, and keeps the highest temperature setting all the year round, thereby increasing the heat loss and causing great waste after long-term accumulation.
Third, data computation and processing is cumbersome. For example, in a water heater system having a plurality of water storage containers, the temperature of water in each container is different, and the amount of hot water measured by temperature cannot be directly summed. In fact, even if there is only one water storage container, the temperature of the hot water inside the water storage container is not uniformly distributed, but is distributed in a gradient manner. The total amount of hot water is difficult to measure by using temperature or heat, and the hot water is lack of comparability, so that the data calculation and processing of the water heater system are troublesome.
Disclosure of Invention
The application discloses an equivalent hot water amount measuring and controlling method and device for a water storage type water heater and the water storage type water heater. In the technical scheme provided by the application, around the concept of equivalent hot water volume, a brand-new water storage type water heater measurement and control scheme is established, the experience of using hot water by a user is improved, the energy-saving effect is improved, the hot water volume data of a water heater system is more convenient to calculate and process, and the technical problem is solved.
In a first aspect, the application discloses an equivalent hot water amount control method for a water storage type water heater, comprising the following steps: obtaining equivalent hot water quantity according to the hot water quantity in the water storage type water heater, the hot water temperature in the water storage type water heater, the cold water temperature of a water supply system and the equivalent hot water temperature; the equivalent hot water amount is the total amount of mixed water which can be obtained by mixing hot water in the water storage type water heater and cold water in a water supply system into mixed water with equivalent hot water temperature; where the equivalent hot water temperature is at least the temperature at which the user subjectively defines hot water, the equivalent hot water temperature is typically between 40 and 50 ℃.
Further, according to the hot water quantity in the water storage type water heater, the hot water temperature in the water storage type water heater, the cold water temperature of a water supply system and the equivalent hot water temperature, the equivalent hot water quantity is obtained, and the equivalent hot water quantity calculation formula is met:
wherein Mu is equivalent hot water amount in kilogram, Tu is equivalent hot water temperature in Mh1...MhnThe unit of the hot water quantity of each water storage area in the water storage type water heater is kilogram and Th1...ThnThe unit is the hot water temperature of each water storage area in the water storage type water heater, n is the number of the water storage areas in the water storage type water heater, n is more than or equal to 1, and Tc is the cold water temperature of a water supply system, and the unit is.
The above formula is derived as follows, assuming that all the hot water in the storage water heater is output and replaced by the cold water in the water supply system, Mh is the amount of hot water in the storage water heater:
from conservation of energy:
Mu·(Tu-Tc)＝Mh·(Th-Tc)
obtaining:
for the condition that the temperature of hot water in the water storage type water heater is non-uniformly distributed or a plurality of water storage containers are arranged, summing equivalent hot water quantities of a plurality of water storage areas in the water storage type water heater to obtain:
further, in the above calculation formula, only the amount of hot water having a temperature higher than the equivalent hot water temperature is counted in the amount of hot water in the storage water heater.
Further, after obtaining the equivalent hot water amount according to the hot water amount in the water storage type water heater, the hot water temperature in the water storage type water heater, the cold water temperature of the water supply system and the equivalent hot water temperature, the method includes: according to the hot water output rate of the water storage type water heater, the obtained equivalent hot water amount is compensated, and the following calculation formula is met:
Mu′＝ρ·Mu
and Mu' is the equivalent hot water quantity after compensation, Mu is the equivalent hot water quantity before compensation, and rho is the hot water output rate of the water storage type water heater.
Further, after obtaining the equivalent hot water amount according to the hot water amount in the water storage type water heater, the hot water temperature in the water storage type water heater, the cold water temperature of the water supply system and the equivalent hot water temperature, the method includes: when the heating device heats hot water in the water storage type water heater while using hot water, the obtained equivalent hot water amount is compensated according to the output power of the heating device, the heating efficiency of the heating device, the equivalent hot water temperature, the equivalent hot water unit flow and the cold water temperature of a water supply system, and the following calculation formula is met:
Wherein Mu' is the equivalent hot water amount after compensation, Mu is the equivalent hot water amount before compensation, P is the output power of the heating device and the unit is watt, eta is the heating efficiency of the heating device, Tu is the equivalent hot water temperature and the unit is DEG C, s is the equivalent hot water unit flow and the unit is kilogram/second, Tc is the cold water temperature of the water supply system and the unit is DEG C, and c is the specific heat capacity and the numerical value of water and the unit is 4.2 multiplied by 10 3Joule/kg.
The derivation of the above formula is as follows, assuming that all the heat output by the heating device is taken away by the outputted hot water, Δ Mu brings the increment of the equivalent hot water amount for the temperature rise, Δ Th brings the temperature rise of the hot water in the water storage type water heater by the heating device in the equivalent hot water available time period, and τ is the equivalent hot water available time period:
derived from energy conservation:
c·Mh·ΔTh＝η·P·τ
defined by the equivalent hot water available time, we get:
then:
obtaining:
obtaining the increment of equivalent hot water quantity brought by temperature rise by energy conservation:
Mh·ΔTh＝ΔMu·(Tu-Tc)
obtaining:
the increment of the equivalent hot water quantity can increase the available time of the equivalent hot water to bring new temperature rise and bring new increment of the equivalent hot water quantity to infinite items, and the infinite items are summed to obtain:
summing the geometric series to obtain:
when in use
When the temperature of the water is higher than the set temperature,
further, it includes: setting an equivalent hot water quantity control target; and controlling the water storage type water heater according to the difference value between the equivalent hot water amount and the equivalent hot water amount control target, so that the equivalent hot water amount and the equivalent hot water amount control target approach.
Further, setting an equivalent hot water amount control target including at least one of: setting an equivalent hot water amount control target through pre-configuration; setting an equivalent hot water amount control target through user setting; setting an equivalent hot water amount control target according to the number of users; and reserving according to the date or the time period, and setting different equivalent hot water amount control targets.
Further, according to the difference between the equivalent hot water amount and the equivalent hot water amount target, the water storage type water heater is controlled to enable the equivalent hot water amount and the equivalent hot water amount control target to approach, and the control method comprises at least one of the following steps: when the equivalent hot water quantity is less than the set equivalent hot water quantity control target and the difference value exceeds a certain degree, starting a heating device of the water storage type water heater or improving the output power of the heating device of the water storage type water heater; when the equivalent hot water quantity is larger than the set equivalent hot water quantity control target and the difference value exceeds a certain degree, closing the heating device of the water storage type water heater or reducing the output power of the heating device of the water storage type water heater; when the equivalent hot water quantity is less than the set equivalent hot water quantity control target and the difference value exceeds a certain degree, starting a circulating device of the water storage type water heater or increasing the rotating speed of the circulating device of the water storage type water heater; and when the equivalent hot water quantity is larger than the set equivalent hot water quantity control target and the difference value exceeds a certain degree, closing the circulating device of the water storage type water heater or reducing the rotating speed of the circulating device of the water storage type water heater.
Further, comprising: dividing the equivalent hot water quantity by the equivalent hot water unit flow to obtain the equivalent hot water available time length; the equivalent hot water usable time length is the total usable time length assuming that the hot water with equivalent hot water amount is used in equivalent hot water unit flow; the equivalent hot water unit flow rate is at least the unit flow rate when the user subjectively considers normal water use, and the equivalent hot water unit flow rate is generally between 3 and 6 kilograms per minute.
Further, it includes: setting an equivalent hot water available duration control target; and controlling the water storage type water heater according to the difference value between the equivalent hot water available time length and the set equivalent hot water available time length control target, so that the equivalent hot water available time length approaches the set equivalent hot water available time length control target.
Further, setting an equivalent hot water available time period control target includes at least one of: setting an equivalent hot water available time control target through pre-configuration; setting an equivalent hot water available time control target through user setting; setting an equivalent hot water available time control target according to the number of users; and reserving according to the date or the time period, and setting different equivalent hot water available time length control targets.
Further, controlling the water storage type water heater according to the difference between the equivalent hot water available time length and the equivalent hot water available time length control target, so that the equivalent hot water available time length and the equivalent hot water available time length control target approach, wherein the control method comprises at least one of the following steps: when the equivalent hot water available time is less than the equivalent hot water available time control target and the difference value exceeds a certain degree, starting a heating device of the water storage type water heater or improving the output power of the heating device of the water storage type water heater; when the available time of the equivalent hot water is longer than the available time control target of the equivalent hot water and the difference value exceeds a certain degree, closing the heating device of the water storage type water heater or reducing the output power of the heating device of the water storage type water heater; when the equivalent hot water available time length is less than the equivalent hot water available time length control target and the difference value exceeds a certain degree, starting a circulating device of the water storage type water heater or increasing the rotating speed of the circulating device of the water storage type water heater; and when the equivalent hot water available time is longer than the equivalent hot water available time control target and the difference value exceeds a certain degree, closing the circulating device of the water storage type water heater or reducing the rotating speed of the circulating device of the water storage type water heater.
The second aspect, the application discloses equivalent hot water volume measurement and control device of water storage formula water heater includes: an equivalent hot water quantity control method of a water storage type water heater is applied.
In a third aspect, the application discloses a water storage type water heater, comprising: an equivalent hot water quantity control method of a water storage type water heater is applied.
The technical scheme of the application has the following beneficial effects: 1. compared with the temperature, the equivalent hot water quantity and the equivalent hot water available time are closer to the actual experience of using hot water by a user, the meaning of the hot water is easy to understand, the user can intuitively know the current working state of the water storage type water heater, and the user experience is improved; and easily find out the self 'sufficient' state, thus providing possibility for reducing borrowing power. 2. The equivalent hot water quantity and the equivalent hot water available time are used as control targets, so that a user can easily set the control targets, the control process is automatically completed by equipment, the problem of hot water quantity change caused by seasonal changes of the cold water temperature of a water supply system is avoided, and the user experience and the energy-saving effect are further improved. 3. The equivalent hot water quantity and the equivalent hot water available time length can be used for direct summation calculation, and the method has comparability, is convenient for data processing, and provides possibility for efficient management of domestic hot water.
Drawings
Fig. 1 shows a water storage type water heater and an equivalent hot water amount measuring and controlling device thereof.
Fig. 2 shows the equivalent hot water amount displayed by the equivalent hot water amount measuring and controlling device of the water storage type water heater.
Fig. 3 shows a water storage type water heater and an equivalent hot water available time measuring and controlling device thereof.
Fig. 4 shows the equivalent hot water usable time length displayed by the equivalent hot water usable time length measuring and controlling device of the water storage type water heater.
Detailed Description
In the first embodiment of the application, as shown in fig. 1, a water storage type water heater and an equivalent hot water amount measuring and controlling device thereof are provided. The equivalent hot water amount measuring and controlling device 2 of the water storage type water heater is connected with the water storage type water heater 1 and used for controlling the water storage type water heater 1. The equivalent hot water quantity measuring and controlling device 2 of the water storage type water heater applies an equivalent hot water quantity measuring and controlling method of the water storage type water heater, and comprises the following steps: obtaining the equivalent hot water quantity according to the hot water quantity in the water storage type water heater 1, the hot water temperature in the water storage type water heater, the cold water temperature of a water supply system and the equivalent hot water temperature, wherein the equivalent hot water quantity accords with an equivalent hot water quantity calculation formula:
wherein Mu is equivalent hot water amount in kilogram, Tu is equivalent hot water temperature in Mh1...MhnThe unit of the hot water quantity of each water storage area in the water storage type water heater 1 is kilogram and Th1...ThnThe unit of the hot water temperature of each water storage area in the water storage type water heater 1 is, n is the number of the water storage areas in the water storage type water heater 1, n is more than or equal to 1, and Tc is the cold water temperature of a water supply system and the unit is.
When the temperature of the hot water in the water storage type water heater 1 can be approximately uniformly distributed or the temperature of the water at a certain position in the water storage type water heater 1 can be approximately equal to the average temperature of the hot water in the water storage type water heater 1, the temperature can be sensed by only one sensor to obtain the temperature of the hot water in the water storage type water heater 1 for calculating the equivalent hot water amount, which is a technical scheme with low cost advantage when the precision requirement is not high.
However, the temperature of the hot water in the water storage type water heater 1 is not always uniformly distributed, even the inside of the water storage type water heater 1 may have a plurality of water storage containers, in order to accurately measure the equivalent hot water amount of the water storage type water heater 1, a plurality of sensors are required to sense the temperature of a plurality of water storage areas in the water storage type water heater 1, and theoretically, the more the number of the sensors is, the more accurate the calculation of the equivalent hot water amount is.
The hot water volume of each water storage area in the water storage type water heater 1 can be calculated according to the geometric structure in the water storage type water heater 1, and can also be obtained according to the measurement of the water capacity of the water storage type water heater 1 in advance.
The temperature of the cold water of the water supply system can be obtained by sensing the temperature near the water inlet of the water storage type water heater 1 through a sensor, and can also be obtained by sensing the recent lowest temperature in the water storage type water heater through the sensor.
The equivalent hot water temperature can be preset or can be set by a user; in order to compensate the bathing environment temperature change caused by seasonal temperature change, the ambient temperature can be sensed through the sensor, and the equivalent hot water temperature can be increased or decreased according to the change of the ambient temperature, so that a comfortable bathing environment is created.
Considering that the storage water heater generally outputs hot water with higher temperature first, and the temperature lower than the equivalent hot water temperature is not considered as hot water, the first alternative method is that in the equivalent hot water amount calculation formula, only the storage area in the storage water heater 1 with the hot water temperature higher than the equivalent hot water temperature is included in the summation range, and the area with the temperature not reaching the equivalent hot water temperature is not included in the summation range.
Considering the influence of the hot water output rate on the equivalent hot water amount, the second optional method is to compensate the obtained equivalent hot water amount according to the hot water output rate of the water storage type water heater 1, and the following calculation formula is satisfied:
Mu′＝ρ·Mu
and Mu' is the equivalent hot water amount after compensation, Mu is the equivalent hot water amount before compensation, and rho is the hot water output rate of the water storage type water heater 1.
In consideration of the influence of the heating device, the third optional method is to compensate the obtained equivalent hot water amount according to the output power of the heating device, the heating efficiency of the heating device, the equivalent hot water temperature, the equivalent hot water unit flow rate and the cold water temperature of the water supply system in the case that the heating device heats the hot water in the water storage type water heater 1 while using the hot water, and the following calculation formula is satisfied:
Wherein Mu' is the equivalent hot water amount after compensation, Mu is the equivalent hot water amount before compensation, P is the output power of the heating device and has unit of watt, eta is the heating efficiency of the heating device, Tu is the equivalent hot water temperature and has unit of DEG C, Tc is the cold water temperature of the water supply system and has unit of DEG C, s is the equivalent hot water temperatureUnit flow rate, unit is kilogram/second, c is specific heat capacity of water, value and unit are 4.2X 103Joule/kg.
The equivalent hot water amount measuring and controlling device 2 of the water storage type water heater is provided with a display for displaying equivalent hot water amount and equivalent hot water temperature, and as shown in fig. 2, the equivalent hot water amount displayed by the equivalent hot water amount measuring and controlling device of the water storage type water heater. Displaying the numerical value and the unit of the equivalent hot water quantity in the first display area, and displaying the numerical value and the unit of the equivalent hot water temperature in the second display area; the area of the first display area is larger than that of the second display area, and the font of the first display area is larger than that of the second display area; displaying a rectangle in a first area, wherein the rectangle is divided into two parts, and the area ratio of the two parts is changed along with the value of the equivalent hot water quantity; the display state can be different according to different intervals of the displayed numerical value, and the difference of the different display states comprises at least one of the following: different colors, different brightness, flashing or non-flashing.
The equivalent hot water amount measuring and controlling device 2 of the water storage type water heater also has a control function, and as shown in fig. 1, the water storage type water heater and the equivalent hot water amount measuring and controlling device thereof. The equivalent hot water amount measurement and control device 2 of the water storage type water heater applies an equivalent hot water amount measurement and control method of the water storage type water heater, and comprises the following steps: setting an equivalent hot water quantity control target; and controlling the water storage type water heater 1 according to the difference value between the equivalent hot water amount and the equivalent hot water amount control target, so that the equivalent hot water amount approaches to the set equivalent hot water amount control target.
Setting an equivalent hot water amount control target, wherein the equivalent hot water amount control target comprises at least one of the following steps: setting an equivalent hot water amount control target through pre-configuration; setting an equivalent hot water amount control target through user setting; setting an equivalent hot water amount control target according to the number of users; and reserving according to the date or the time period, and setting different equivalent hot water amount control targets.
Controlling the water storage type water heater according to the difference value between the equivalent hot water amount and the equivalent hot water amount target, so that the equivalent hot water amount and the equivalent hot water amount control target approach to each other, wherein the control method comprises at least one of the following steps: when the equivalent hot water amount is less than the set equivalent hot water amount control target and the difference value exceeds a certain degree, starting the heating device of the water storage type water heater 1 or improving the output power of the heating device of the water storage type water heater 1; when the equivalent hot water amount is larger than the set equivalent hot water amount control target and the difference value exceeds a certain degree, closing the heating device of the water storage type water heater 1 or reducing the output power of the heating device of the water storage type water heater 1; when the equivalent hot water amount is less than the set equivalent hot water amount control target and the difference value exceeds a certain degree, starting a circulating device of the water storage type water heater 1 or increasing the rotating speed of the circulating device of the water storage type water heater 1; and when the equivalent hot water quantity is larger than the set equivalent hot water quantity control target and the difference value exceeds a certain degree, closing the circulating device of the water storage type water heater 1 or reducing the rotating speed of the circulating device of the water storage type water heater 1.
The advantages of the first embodiment of the present application are further described as follows:
firstly, the hot water using experience which is not influenced by the water temperature of the water supply system is obtained.
For example, the mass of water in the water storage type water heater 1 is 100 kg, the user sets the equivalent hot water amount control target to 160 kg, and the equivalent hot water temperature is 50 ℃; in winter, the temperature of cold water of a water supply system is only 10 ℃, the equivalent hot water quantity measuring and controlling device 2 of the water storage type water heater keeps the equivalent hot water quantity of the water storage type water heater 1 at 160 kilograms, and the temperature of water in the water storage type water heater 1 is about 74 ℃; in summer, the temperature of cold water of a water supply system can reach 25 ℃, the equivalent hot water quantity measuring and controlling device 2 of the water storage type water heater also keeps the equivalent hot water quantity of the water storage type water heater 1 at 160 kilograms, and the temperature of water in the water storage type water heater 1 is about 65 ℃; in the four seasons, no matter how the cold water temperature of the water supply system changes, the equivalent hot water quantity keeps constant, namely, the available hot water quantity keeps constant, a user does not worry about insufficient hot water quantity caused by too low cold water temperature of the water supply system, and does not worry about electric energy waste caused by too high temperature setting, and user experience and energy-saving effect are improved.
And secondly, the degree of freedom of the control target setting mode is large.
The concept of the equivalent hot water quantity or the equivalent hot water available time is close to the actual hot water use experience of a user, the equivalent hot water quantity is used as a control target, the concept is clear, and the numerical value is easy to understand; the equivalent hot water quantity measuring and controlling device 2 of the water storage type water heater has various modes of setting a control target: through the pre-configuration, the control target is adjusted through the setting of a user, the reservation can be carried out according to the number of users, even according to the date or the time period, different control targets are set, and the degree of freedom of the setting mode of the control targets is large.
And thirdly, the equivalent hot water temperature is adjustable, and the user experience is more close to.
The equivalent hot water temperature of the equivalent hot water quantity measuring and controlling device 2 of the water storage type water heater is adjustable, can be set according to different people, and can even be adjusted according to the environment temperature by detecting the environment temperature. For example, if the ambient temperature is low, the equivalent hot water temperature is increased correspondingly, for example, 5 ℃, so as to compensate for the extra heat dissipation caused by the low ambient temperature and create a warm bathing environment. The equivalent hot water amount measuring and controlling device 2 of the water storage type water heater can complete the function without additional and complicated manual adjustment, and all the functions are automatically realized.
In the second embodiment of the present application, as shown in fig. 3, the water storage type water heater and the equivalent hot water available time length measurement and control device thereof are provided. The equivalent hot water available time duration device 3 of the water storage type water heater is connected with the water storage type water heater 1 and used for controlling the water storage type water heater 1. The equivalent hot water available time duration device 3 of the water storage type water heater applies the equivalent hot water measuring and controlling method of the water storage type water heater, which comprises the following steps: and dividing the equivalent hot water quantity by the equivalent hot water unit flow to obtain the equivalent hot water available time length. The method for obtaining the equivalent hot water amount is the same as that of the embodiment of the application; the equivalent hot water unit flow rate can be preset or can be set by a user.
The measurement and control device 3 for measuring and controlling the equivalent hot water availability time of the water storage type water heater is provided with a display for displaying the equivalent hot water availability time, the equivalent hot water temperature and the equivalent hot water unit flow, as shown in fig. 4, the equivalent hot water availability time displayed by the measurement and control device for measuring and controlling the equivalent hot water availability time of the water storage type water heater is shown. Displaying the value and the unit of the available time of the equivalent hot water in a first display area, and displaying the value and the unit of the equivalent hot water temperature and the equivalent hot water unit flow in a second display area; the area of the first display area is larger than that of the second display area, and the font of the first display area is larger than that of the second display area; displaying a rectangle in a first area, wherein the rectangle is divided into two parts, and the area ratio of the two parts is changed along with the value of the available time of the equivalent hot water; the display state can be different according to different intervals of the displayed numerical value, and the difference of the different display states comprises at least one of the following: different colors, different brightness, flashing or non-flashing.
The measurement and control device 3 for measuring and controlling the available time of equivalent hot water of the water storage type water heater has a control function, and as shown in fig. 3, the water storage type water heater and the measurement and control device for measuring and controlling the available time of equivalent hot water thereof. The measurement and control device 3 for measuring and controlling the available time of equivalent hot water of the water storage type water heater applies a measurement and control method for equivalent hot water of the water storage type water heater, and comprises the following steps: setting an equivalent hot water available duration control target; and controlling the water storage type water heater according to the difference value between the equivalent hot water available time length and the equivalent hot water available time length control target, so that the equivalent hot water available time length approaches the set equivalent hot water available time length control target.
Setting an equivalent hot water available time period control target including at least one of: setting an equivalent hot water available time control target through pre-configuration; setting an equivalent hot water available time control target through user setting; setting an equivalent hot water available time control target according to the number of users; and reserving according to the date or the time period, and setting different equivalent hot water available time length control targets.
Controlling the water storage type water heater according to the difference value between the equivalent hot water available time length and the equivalent hot water available time length control target, so that the equivalent hot water available time length and the equivalent hot water available time length control target approach, wherein the control method comprises at least one of the following steps: when the equivalent hot water available time is less than the equivalent hot water available time control target and the difference value exceeds a certain degree, starting a heating device of the water storage type water heater or improving the output power of the heating device of the water storage type water heater; when the available time of the equivalent hot water is longer than the available time control target of the equivalent hot water and the difference value exceeds a certain degree, closing the heating device of the water storage type water heater or reducing the output power of the heating device of the water storage type water heater; when the equivalent hot water available time length is less than the equivalent hot water available time length control target and the difference value exceeds a certain degree, starting a circulating device of the water storage type water heater or increasing the rotating speed of the circulating device of the water storage type water heater; and when the equivalent hot water available time is longer than the equivalent hot water available time control target and the difference value exceeds a certain degree, closing the circulating device of the water storage type water heater or reducing the rotating speed of the circulating device of the water storage type water heater.
Claims (6)
1. The equivalent hot water amount measuring and controlling method of the water storage type water heater is characterized by comprising the following steps:
obtaining equivalent hot water quantity according to the hot water quantity in the water storage type water heater, the hot water temperature in the water storage type water heater, the cold water temperature of a water supply system and the equivalent hot water temperature;
the equivalent hot water amount is the total amount of mixed water which can be obtained by mixing hot water in the water storage type water heater and cold water in a water supply system into mixed water with equivalent hot water temperature; wherein the equivalent hot water temperature is at least the temperature of hot water subjectively defined by a user, and is between 40 and 50 ℃;
the method conforms to the equivalent hot water quantity calculation formula:
wherein Mu is equivalent hot water amount in kilogram, Tu is equivalent hot water temperature in Mh1...MhnThe unit of the hot water quantity of each water storage area in the water storage type water heater is kilogram and Th1...ThnThe unit of the hot water temperature of each water storage area in the water storage type water heater is, n is the number of the water storage areas in the water storage type water heater, n is more than or equal to 1, Tc is the cold water temperature of a water supply system, and the unit is;
in the equivalent hot water quantity calculation formula, only a water storage area in the water storage type water heater, in which the hot water temperature is higher than the equivalent hot water temperature, is included in a summation range;
According to the hot water output rate of the water storage type water heater, the obtained equivalent hot water amount is compensated, and the following calculation formula is met:
Mu′＝ρ·Mu，
wherein Mu' is the equivalent hot water quantity after compensation, Mu is the equivalent hot water quantity before compensation, and rho is the hot water output rate of the water storage type water heater;
when the heating device heats hot water in the water storage type water heater while using hot water, the obtained equivalent hot water amount is compensated according to the output power of the heating device, the heating efficiency of the heating device, the equivalent hot water temperature, the equivalent hot water unit flow and the cold water temperature of a water supply system, and the following calculation formula is met:
wherein Mu' is the equivalent hot water amount after compensation, Mu is the equivalent hot water amount before compensation, P is the output power of the heating device and the unit is watt, eta is the heating efficiency of the heating device, Tu is the equivalent hot water temperature and the unit is DEG C, Tc is the cold water temperature of the water supply system and the unit is DEG C, s is the equivalent hot water unit flow and the unit is kilogram/second, c is the specific heat capacity and the numerical value of water and the unit is 4.2 multiplied by 103Joule/kg.;
the equivalent hot water amount and the equivalent hot water temperature are displayed.
2. The equivalent hot water amount control method of a water storage type water heater according to claim 1, comprising:
Setting an equivalent hot water quantity control target;
and controlling the water storage type water heater according to the difference value between the equivalent hot water amount and the equivalent hot water amount control target, so that the equivalent hot water amount approaches to the set equivalent hot water amount control target.
3. The equivalent hot water amount control method of a water storage type water heater according to claim 2, wherein the setting of the equivalent hot water amount control target includes at least one of:
setting an equivalent hot water amount control target through pre-configuration;
setting an equivalent hot water amount control target through user setting;
setting an equivalent hot water amount control target according to the number of users;
and reserving according to the date or the time period, and setting different equivalent hot water amount control targets.
4. The equivalent hot water amount control method of a water storage type water heater according to claim 3,
controlling the water storage type water heater according to the difference value between the equivalent hot water amount and the equivalent hot water amount target, so that the equivalent hot water amount and the equivalent hot water amount control target approach to each other, wherein the control method comprises at least one of the following steps:
when the equivalent hot water quantity is less than the set equivalent hot water quantity control target and the difference value exceeds a certain degree, starting a heating device of the water storage type water heater or improving the output power of the heating device of the water storage type water heater;
When the equivalent hot water quantity is larger than the set equivalent hot water quantity control target and the difference value exceeds a certain degree, closing the heating device of the water storage type water heater or reducing the output power of the heating device of the water storage type water heater;
when the equivalent hot water quantity is less than the set equivalent hot water quantity control target and the difference value exceeds a certain degree, starting a circulating device of the water storage type water heater or increasing the rotating speed of the circulating device of the water storage type water heater;
and when the equivalent hot water quantity is larger than the set equivalent hot water quantity control target and the difference value exceeds a certain degree, closing the circulating device of the water storage type water heater or reducing the rotating speed of the circulating device of the water storage type water heater.
5. Equivalent hot water volume measurement and control device of water storage formula water heater, its characterized in that includes: use of a method according to any one of claims 1 to 4.
6. A water storage type water heater, comprising: use of a method according to any one of claims 1 to 4.
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